Consult your health care practitioner before using any health supplement, especially if you are pregnant or nursing, anticipate surgery, take any medication or are under medical supervision.

Consult with a physician before taking vitamin D if you have sarcoidosis, liver disease, lymphoma , kidney disease, hyperthyroidism or tuberculosis.

Vitamin D drug interaction information: Phenobarbital, Cholestyramine (Questran), orlistat (Xenical), colestipol (Colestid), phenytoin (Dilantin), and mineral oil may interfere with vitamin D absorption and metabolism. If you are taking any of these drugs you may need to increase your dose of vitamin D.

Consult with a physician before taking vitamin D if you are using thiazide diuretics or digoxin (Lanoxin).